%0 Journal Article
%A V. I. Mironenko
%A V. V. Mironenko
%T The center-focus problem and reflecting function
%J Problemy fiziki, matematiki i tehniki
%D 2020
%P 80-84
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/PFMT_2020_2_a14/
%G en
%F PFMT_2020_2_a14